Mention that the "file:/usr/share/doc/..." URLs are only accessible on machines running FreeBSD 2.1 or later.
Mention that the "file:/usr/share/doc/..." URLs are only accessible
on machines running FreeBSD 2.1 or later.

Pointed out-by:  Felipe Garcia <fxg@usis.usemb.se>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase